I think these are fabulous and really interesting!
They are necklace which wrap around the neck/shoulder, come together at the waist and usually tie/clasp at the lower back.

See here for examples:
http://www.brookandlyn.com/blog/?p=4529
http://theowlsarenotwhattheyse.....surrounded

I think they're really interesting and bohemian looking...I'd definitely wear them!
Anyone seen these elsewhere?